Hands-On Design Patterns with Java

Programming the design pattern

Our game-level creation system starts with the abstract BaseLevel class. This class implements Java's Cloneable interface. There are three class variables that will be part of each game level that's created—levelName, numberOfNPCs, and numberOfTokens. Following the class variables are the three accessor methods, one for each of the variables:

public abstract class BaseLevel implements Cloneable {    public String levelName;    public int numberOfNPCs;    public int numberOfTokens;    // accessor methods    public String getLevelName() {        return levelName;    }    public int getNumberOfNPCs() {        return numberOfNPCs;    }    public int getNumberOfTokens() {        return numberOfTokens;    }

The second half of the BaseLevel class contains the mutator ...